5.3 - Recovery Equipment Certification and Service Fittings

Module: Recovery Recycling Reclaiming Evacuation and Dehydration
Regulatory verification date: August 9, 2026
Primary authority: 40 CFR Part 82, Subpart F and current EPA Section 608 recovery-equipment guidance
Course role: Explains how recovery and recycling equipment is certified, how manufacture dates affect the applicable performance standards, and how fittings and appliance access points support compliant refrigerant removal

Learning Objectives

After completing this section, a student should be able to:

1. Explain why Section 608 requires recovery and recycling equipment to meet EPA performance standards.
2. Identify the roles of AHRI and UL as EPA-approved equipment testing organizations and distinguish those organizations from the technical standards incorporated into the regulations.
3. Use the important equipment-manufacture dates November 15, 1993, September 22, 2003, and January 1, 2017 to identify the applicable certification framework.
4. State the current recovery-performance requirements for equipment used with small appliances and distinguish equipment-certification performance from the technician’s field recovery requirement.
5. Define low-loss fitting, process stub, and servicing aperture, and explain how each supports refrigerant conservation.
6. Explain why recovery and recycling equipment must be used according to the manufacturer’s directions unless those directions conflict with federal requirements.

Introduction

Section 5.2 distinguished:

System-dependent recovery equipment

from:

Self-contained recovery equipment

That classification explains how refrigerant is moved.

Section 5.3 addresses a different question:

How do we know that recovery or recycling equipment is capable of meeting the required EPA performance level?

Section 608 does not rely only on a manufacturer’s claim that a recovery machine works.

Recovery and recycling equipment is subject to:

• EPA performance requirements.
• Third-party certification where required.
• Equipment labeling.
• Standards that depend partly on the equipment manufacture or import date.
• Specific small-appliance recovery-performance requirements.
• Requirements for low-loss hose fittings.
• Appliance access provisions that make refrigerant removal possible.
• Manufacturer operating instructions.

A useful distinction is:

Technician certification
→ qualifies the person

Recovery-equipment certification
→ verifies the equipment model meets applicable EPA requirements

These are separate requirements.

A certified technician still needs appropriate certified recovery equipment when the regulation requires it.

Key Concepts

1. Recovery Equipment Must Meet EPA Requirements

Section 608 requires refrigerant recovery and recycling equipment used during covered maintenance, service, repair, or disposal to meet applicable performance requirements.

The regulatory concept is:

Recovery equipment
→ tested against an applicable standard
→ verified to meet EPA minimum requirements
→ labeled for the appropriate appliance category

The goal is to make refrigerant recovery measurable rather than dependent on guesswork.

Equipment certification addresses questions such as:

• Can the machine achieve the required recovery performance?
• Is the machine suitable for the appliance category for which it is certified?
• Does it meet applicable equipment requirements?
• For newer flammable-refrigerant equipment, does it also meet the applicable safety-testing framework?

2. Technician Certification and Equipment Certification Are Different

A technician may hold:

• Type I.
• Type II.
• Type III.
• Universal certification.

That credential concerns the person performing regulated work.

Recovery-equipment certification concerns the equipment model.

Therefore:

Certified technician
≠
automatic certification of any recovery machine

and:

Certified recovery machine
≠
technician certification

The technician must use equipment appropriate to:

• The refrigerant.
• The appliance category.
• The service task.
• The applicable Section 608 requirements.

3. EPA-Approved Equipment Testing Organizations

EPA currently identifies two organizations that are approved to certify Section 608 recovery and recycling equipment:

AHRI
UL

AHRI is the:

Air-Conditioning, Heating, and Refrigeration Institute

UL is:

Underwriters Laboratories

These organizations perform or administer equipment-certification testing under the EPA-approved framework.

An approved certification label identifies that the equipment has been certified to meet EPA’s minimum requirements for the appropriate appliance category.

4. AHRI as Testing Organization Versus AHRI Standard 740

Do not confuse:

AHRI
→ EPA-approved equipment testing organization

with:

AHRI Standard 740
→ technical performance test standard incorporated into the regulatory framework

AHRI can therefore appear in two different ways:

1. As an organization approved by EPA to certify equipment.
2. As the publisher of the performance standard used as the basis for certain regulatory appendices.

The context determines which meaning applies.

5. UL as Testing Organization Versus UL 1963

The same distinction applies to UL.

UL is an EPA-approved equipment testing organization.

In addition, the current regulatory framework for recovery or recycling equipment intended for use with flammable refrigerants incorporates safety provisions based on:

UL 1963

Therefore:

UL
→ testing organization

and:

UL 1963
→ equipment safety standard used in the flammable-refrigerant certification framework

are related but not identical concepts.

6. Manufacture Date Matters

Several recovery-equipment rules depend on when the equipment was manufactured or imported.

Three dates are especially important:

November 15, 1993
September 22, 2003
January 1, 2017

The first date is especially important for EPA 608 examination preparation because both:

• Recovery-equipment certification provisions.
• Required recovery / evacuation performance.

can distinguish equipment manufactured before versus on or after November 15, 1993.

7. November 15, 1993 Is the Major Legacy Boundary

For most stationary recovery or recycling equipment:

Before November 15, 1993
→ legacy equipment may be considered certified if it meets the applicable performance requirement

whereas:

On or after November 15, 1993
→ third-party certification by an EPA-approved equipment testing organization is required under the applicable standard

This is one of the most frequently tested manufacture-date distinctions.

Do not confuse:

date the appliance was manufactured

with:

date the recovery equipment was manufactured or imported

Some EPA tables use the recovery-equipment manufacture date, not the appliance age.

8. September 22, 2003 Changed the Applicable Test Appendix

For most non-small-appliance stationary recovery or recycling equipment:

November 15, 1993 through September 21, 2003
→ Appendix B1
→ based on ARI Standard 740-1993

September 22, 2003 through December 31, 2016
→ Appendix B2
→ based on ARI Standard 740-1995

The older name ARI refers to the Air-Conditioning and Refrigeration Institute, the predecessor naming reflected in the older standards.

Current material generally uses AHRI for the organization.

9. January 1, 2017 Introduced the Current B3/B4 Framework

For recovery and recycling equipment manufactured or imported on or after January 1, 2017:

Non-flammable refrigerants
→ Appendix B3
→ based on AHRI Standard 740-2016

Flammable refrigerants
→ Appendix B4
→ performance basis from AHRI Standard 740-2016
→ additional safety basis from UL 1963 provisions

This distinction is important because flammable refrigerants require recovery equipment designed and certified for that application.

Do not assume that an older recovery machine is suitable for a flammable refrigerant merely because it can physically move refrigerant.

10. The Certification Label Matters

Certified equipment covered by the labeling requirement must carry a durable label identifying that it has been certified by an approved equipment testing organization to meet EPA minimum requirements for the appropriate appliance category.

The label also includes:

• Date of manufacture.
• Serial number, when applicable.

The practical lesson is:

Do not identify compliant equipment only by brand name or appearance.

Check the equipment label and manufacturer information.

Technical and Regulatory Details

1. Current Equipment-Standard Timeline

The current certification framework for most stationary recovery and recycling equipment can be summarized as follows.

This table addresses the equipment-certification framework.

Do not use it as a substitute for the separate table of required appliance evacuation levels developed later in Section 5.9.

2. Why Multiple Historical Standards Still Appear

Recovery machines remain in service for many years.

Therefore, current regulations still recognize equipment manufactured under several generations of performance standards.

The presence of older standard names does not necessarily mean the information is obsolete.

Instead, ask:

When was the recovery equipment manufactured or imported?

Then identify the applicable certification path.

This is different from a historical rule that has been completely replaced and no longer applies.

3. AHRI and UL Are the Current EPA-Approved Testing Organizations

EPA currently lists:

• AHRI
• UL

as approved organizations for recovery and recycling equipment certification.

The examination-level concept is:

Recovery and recycling equipment manufactured after the applicable legacy date must be certified through an EPA-approved equipment testing organization under the applicable standard.

Do not confuse this with:

• EPA technician certification providers.
• Refrigerant reclaimers.
• Equipment manufacturers.
• Refrigerant manufacturers.

These are different functions.

4. Equipment Label Recognition

A compliant certification label identifies:

• The approved equipment testing organization.
• That the equipment meets EPA minimum recovery or recycling requirements.
• The intended appliance category.
• The equipment manufacture date.
• Serial number when applicable.

A technician should verify that the machine is appropriate for the work being performed.

An equipment label for one category does not automatically mean the unit is suitable for every:

• Refrigerant.
• Appliance.
• Pressure range.
• Safety classification.

5. Do Not Alter Certified Equipment in a Way That Defeats Certification

Current regulations prohibit altering the design of certified recovery or recycling equipment in a way that affects its ability to meet the certification standards unless the altered design is resubmitted for certification testing.

The concept is:

Certified design
→ performance verified

If a modification changes the performance-critical design:

certification cannot simply be assumed to remain valid

Routine maintenance according to manufacturer instructions is not the same as redesigning the certified equipment.

6. Low-Loss Fittings

A low-loss fitting is designed to minimize refrigerant release when a hose or connection is disconnected.

The fitting may:

• Close automatically, or
• Be closed manually before disconnection.

The purpose is:

connect
→ perform service
→ close / isolate
→ disconnect
→ minimize refrigerant release

Current recovery-equipment certification requirements specify low-loss fittings on all hoses for equipment certified under the applicable general recovery-equipment framework.

The low-loss concept is consistent with the broader Section 608 goal of minimizing refrigerant emissions.

7. Low-Loss Does Not Mean Zero Loss

The term low-loss does not mean that absolutely no refrigerant can ever remain in a hose or fitting.

It means that the fitting is designed and used to minimize release during connection and disconnection.

Good practice still includes:

• Correct valve sequence.
• Proper hose handling.
• Avoiding unnecessary hose volume.
• Recovering or managing trapped refrigerant as appropriate.
• Following equipment instructions.

Detailed recovery setup is developed in Section 5.4 - Recovery Preparation.

8. Process Stub

A process stub is a length of tubing that provides access to refrigerant inside a small appliance or room air conditioner and can be resealed after repair or service.

For covered small appliances, the process stub facilitates:

• Refrigerant recovery.
• Servicing.
• Disposal preparation.

The process stub is especially important because many small appliances do not use the same permanent service-valve arrangement found on larger systems.

Conceptually:

Small appliance
→ process stub
→ temporary or service access
→ refrigerant can be removed
→ stub can be resealed

9. Servicing Aperture

The current federal term is:

servicing aperture

not merely service aperture.

For appliances other than small appliances, the rule generally requires a servicing aperture that facilitates refrigerant removal during servicing and disposal, subject to the regulatory exceptions for appliances containing only exempt refrigerants.

The concept is:

Appliance
→ accessible refrigerant circuit
→ servicing aperture
→ connection for refrigerant removal

10. Process Stub Versus Servicing Aperture

For examination purposes:

Small appliance
→ process stub

Other covered appliance
→ servicing aperture

Do not assume that these terms describe the exact same physical fitting.

11. Solderless Access Fittings

Small-appliance service may use temporary solderless or piercing-type access fittings to reach the refrigerant circuit.

These fittings can be useful during service, but they are not necessarily intended to remain permanently installed.

A key Type I examination concept is:

temporary solderless access fitting
→ remove after service when required
→ reseal the system properly

Detailed small-appliance access procedures are developed later in:

Section 7.4 - Access Fittings and Process Stubs.

12. Manufacturer Instructions Are Part of Compliance

Current Section 608 rules require recovery and recycling equipment to be used according to the manufacturer’s directions unless those directions conflict with the federal requirements.

This is important because the certification test assumes a defined operating procedure.

A recovery machine may require specific instructions for:

• Valve positions.
• Hose configuration.
• Liquid or vapor handling.
• Purging or clearing procedures.
• Filter maintenance.
• Oil maintenance where applicable.
• Maximum inlet or discharge pressure.
• Refrigerant compatibility.
• Safe shutdown.

The technician should not improvise a procedure that defeats the performance for which the equipment was certified.

13. Manufacturer Instructions Do Not Override Federal Requirements

The rule is not:

Manufacturer instructions
→ always override everything

The correct hierarchy is:

Federal requirement
→ controlling minimum

Manufacturer instructions
→ follow unless they conflict with the federal requirement

If an instruction would result in a violation of Section 608, the federal requirement controls.

14. Equipment Certification Versus Field Recovery Requirement for Small Appliances

This distinction is important.

Equipment Certification Performance

For small-appliance recovery equipment, the current certification test generally requires equipment to demonstrate capability to recover:

90%
→ when the test-stand compressor is operational

and:

80%
→ when the test-stand compressor is not operational

when tested under the applicable method and used according to manufacturer instructions.

Technician Field Requirement

When a technician opens or disposes of a small appliance, the field requirement depends on:

• Recovery-equipment manufacture date.
• Appliance-compressor condition.
• Whether the four-inch-Hg vacuum alternative is used.

The field service rule is summarized below.

Do not confuse:

equipment performance certification

with:

technician field compliance

They are related, but they answer different questions.

15. Four-Inch Vacuum Alternative

The small-appliance rule includes an alternative to the percentage method:

Evacuate the appliance
→ 4 in. Hg vacuum

This is a refrigerant-recovery endpoint for the applicable small-appliance rule.

It is not the same thing as:

deep dehydration
→ measured in microns

Deep evacuation and dehydration are developed in Section 5.7.

16. Equipment Manufactured Before November 15, 1993

Legacy equipment is treated differently because it predates the modern third-party certification framework.

For small appliances, equipment manufactured before November 15, 1993 can be considered certified if it demonstrates the applicable legacy performance, such as:

• Recovering 80% of refrigerant, or
• Achieving a four-inch vacuum under the applicable test condition.

For other stationary appliances, legacy recovery equipment may be considered certified if it can achieve the applicable evacuation performance specified by the rule.

The important exam concept is:

Pre-November 15, 1993 equipment is not automatically illegal merely because it lacks the later third-party label; it must satisfy the applicable legacy standard.

17. Equipment Manufactured On or After January 1, 2017

For current-generation equipment, the regulatory framework distinguishes:

Non-Flammable Refrigerants

Appendix B3
→ AHRI 740-2016 performance basis

Flammable Refrigerants

Appendix B4
→ AHRI 740-2016 performance basis
+
UL 1963 flammable-refrigerant safety provisions

This means that refrigerant safety classification matters when selecting recovery equipment.

A machine certified for conventional non-flammable refrigerants must not automatically be assumed suitable for a flammable refrigerant.

18. Certification Is for the Appropriate Category

Recovery-equipment certification is tied to an intended category of appliance or use.

A certification label may identify equipment intended for a particular category.

Therefore:

Certified

does not mean:

universally suitable for every refrigerant and every appliance

Before use, confirm:

• Refrigerant compatibility.
• Appliance category.
• Pressure range.
• Safety classification.
• Manufacturer-approved use.

19. EPA No Longer Requires the Former Owner Equipment-Acquisition Certification

EPA’s current recovery-equipment page states that persons servicing stationary air-conditioning and refrigeration equipment are no longer required to certify to EPA that they have acquired recovery or recycling equipment and are complying with the applicable requirements.

This should not be confused with the equipment itself being certified.

The current distinction is:

Old owner/operator equipment-acquisition certification filing
→ no longer required

but:

Applicable recovery equipment certification and use requirements
→ still apply

This is a useful example of why older study material must be checked against current EPA information.

Current Equipment-Standard Summary

Most Stationary Appliances

Before Nov. 15, 1993
→ legacy performance qualification

Nov. 15, 1993 – Sept. 21, 2003
→ Appendix B1
→ ARI 740-1993

Sept. 22, 2003 – Dec. 31, 2016
→ Appendix B2
→ ARI 740-1995

Jan. 1, 2017 and later
→ Appendix B3 for non-flammable refrigerants
→ AHRI 740-2016

Jan. 1, 2017 and later
→ Appendix B4 for flammable refrigerants
→ AHRI 740-2016 + applicable UL 1963 safety provisions

Small-Appliance Equipment

Certification test
→ 90% recovery with operational compressor
→ 80% recovery with non-operational compressor

with additional certification paths allowed by the regulation, including the applicable four-inch-vacuum performance route.

Service Access

Small appliance
→ process stub

Other covered appliance
→ servicing aperture

Hose Connections

Low-loss fittings
→ minimize refrigerant release during disconnection

Equipment Operation

Follow manufacturer directions
unless they conflict with federal requirements

Important Terms

AHRI

AHRI is the Air-Conditioning, Heating, and Refrigeration Institute. EPA currently recognizes AHRI as an approved organization for certifying Section 608 recovery and recycling equipment.

AHRI also publishes technical standards, including Standard 740.

AHRI Standard 740

AHRI Standard 740 establishes performance-test methods for refrigerant recovery and recovery/recycling equipment.

Different regulatory appendices incorporate different historical editions.

Approved Equipment Testing Organization

An approved equipment testing organization is an organization that has received EPA approval to certify recovery and recycling equipment under the applicable Section 608 standards.

Certified Refrigerant Recovery or Recycling Equipment

Certified refrigerant recovery or recycling equipment is equipment that satisfies the applicable certification pathway under 40 CFR Part 82, Subpart F.

The exact pathway depends partly on equipment type and manufacture or import date.

Low-Loss Fitting

A low-loss fitting is a connection device intended to minimize refrigerant release when hoses, appliances, or recovery and recycling machines are disconnected.

It closes automatically or is closed manually before disconnection.

Process Stub

A process stub is a length of tubing that provides access to refrigerant inside a small appliance or room air conditioner and can be resealed after service.

Servicing Aperture

A servicing aperture is an appliance access point provided to facilitate refrigerant removal during servicing and disposal.

The current federal wording uses servicing aperture.

UL

UL is Underwriters Laboratories, an EPA-approved equipment testing organization for Section 608 recovery and recycling equipment.

UL 1963

UL 1963 is a safety standard used in the current flammable-refrigerant recovery-equipment certification framework incorporated through Appendix B4.

EPA 608 Exam Focus

What Students Must Remember

• Recovery-equipment certification and technician certification are different.
• EPA requires applicable recovery and recycling equipment to meet defined performance standards.
• EPA currently recognizes AHRI and UL as approved recovery-equipment testing organizations.
• A certification label identifies that the equipment meets EPA minimum requirements for the appropriate appliance category.
• Certified equipment labels include the manufacture date and serial number when applicable.
• The major legacy date is November 15, 1993.
• Equipment manufactured before November 15, 1993 may qualify under legacy performance provisions.
• Most equipment manufactured on or after November 15, 1993 requires third-party certification under the applicable standard.
• November 15, 1993 – September 21, 2003: Appendix B1 / ARI 740-1993.
• September 22, 2003 – December 31, 2016: Appendix B2 / ARI 740-1995.
• January 1, 2017 and later, non-flammable refrigerants: Appendix B3 / AHRI 740-2016.
• January 1, 2017 and later, flammable refrigerants: Appendix B4 / AHRI 740-2016 plus applicable UL 1963 safety provisions.
• Small-appliance recovery equipment is tested for 90% recovery with an operational compressor and 80% with a non-operational compressor under the applicable certification method.
• In the field, the small-appliance recovery requirement depends on recovery-equipment date and compressor condition.
• The field rule also permits the 4 in. Hg vacuum alternative.
• A low-loss fitting minimizes refrigerant release when a connection is disconnected.
• A process stub provides resealable refrigerant access to a small appliance or room air conditioner.
• The current regulatory term for larger-appliance access is servicing aperture.
• Recovery and recycling equipment must be used according to manufacturer directions unless those directions conflict with federal requirements.
• Do not assume that a machine certified for a non-flammable refrigerant is approved for a flammable refrigerant.
• EPA no longer requires the former equipment-acquisition certification filing by persons servicing stationary equipment, but applicable equipment-certification requirements remain.

Date Memory Aid

1993
→ modern third-party certification boundary

2003
→ B1 changes to B2

2017
→ B3 / B4 current-generation framework

Small-Appliance Memory Aid

POST-1993 EQUIPMENT

Compressor works
→ 90%

Compressor does not work
→ 80%

Alternative
→ 4 in. Hg vacuum

Access Memory Aid

Small appliance
→ Process stub

Other covered appliance
→ Servicing aperture

Typical Exam Question Patterns

Students may be asked to:

• Identify why recovery equipment is third-party certified.
• Identify AHRI or UL as approved testing organizations.
• Distinguish AHRI the organization from AHRI Standard 740.
• Recognize November 15, 1993 as an important equipment-manufacture date.
• Select the correct small-appliance percentage based on compressor condition.
• Recognize the four-inch-Hg vacuum alternative.
• Define a low-loss fitting.
• Identify the purpose of a process stub.
• Distinguish a process stub from a servicing aperture.
• Recognize that manufacturer instructions must be followed.
• Identify why equipment suitable for a non-flammable refrigerant may not be suitable for a flammable refrigerant.
• Recognize the significance of January 1, 2017 for current equipment standards.

High-Priority Comparison Table

Common Mistakes and Confusing Points

Mistake 1: Confusing Technician Certification With Equipment Certification

A Universal technician does not make uncertified equipment compliant.

Likewise, an equipment-certification label does not certify the technician.

Mistake 2: Assuming EPA Personally Tests Every Recovery Machine

EPA establishes and administers the regulatory framework.

Approved testing organizations certify equipment under that framework.

Mistake 3: Confusing AHRI With AHRI Standard 740

AHRI can refer to the organization.

AHRI Standard 740 is a technical performance standard.

Mistake 4: Confusing UL With UL 1963

UL is an approved testing organization.

UL 1963 is a safety standard incorporated into the flammable-refrigerant equipment framework.

Mistake 5: Using the Appliance Manufacture Date Instead of the Recovery-Equipment Manufacture Date

When a recovery rule distinguishes pre-1993 from post-1993 equipment, read the question carefully.

The date may refer to the recovery equipment, not the appliance.

Mistake 6: Treating November 15, 1993 as the Only Relevant Equipment Date

It is the most important examination date, but the current certification framework also distinguishes:

• September 22, 2003.
• January 1, 2017.

Mistake 7: Saying All Pre-1993 Recovery Equipment Is Uncertified

Pre-November 15, 1993 equipment can qualify under the legacy performance provisions.

Mistake 8: Treating a Low-Loss Fitting as a Guarantee of Zero Release

Low-loss fittings minimize emissions.

They do not eliminate the need for correct connection, valve, and hose-handling procedures.

Mistake 9: Calling a Process Stub a Permanent Service Valve

A process stub is tubing that provides access and can be resealed.

The exact service fitting used on the stub can vary.

Mistake 10: Using “Service Aperture” as Though It Were the Exact Federal Term

The current regulation uses:

servicing aperture

This terminology is preferred when referring directly to the federal requirement.

Mistake 11: Applying the 90% Small-Appliance Requirement Without Checking Compressor Condition

For post-1993 recovery equipment:

functional compressor
→ 90%

nonfunctional compressor
→ 80%

Mistake 12: Confusing the Four-Inch Recovery Vacuum With Deep Dehydration

The four-inch-Hg value is an allowed small-appliance recovery endpoint.

It is not the micron-level dehydration process covered later in this module.

Mistake 13: Assuming Certified Equipment Is Suitable for Every Refrigerant

Equipment must still be approved and suitable for the refrigerant and application.

Flammable refrigerants require equipment that satisfies the applicable flammable-refrigerant framework.

Mistake 14: Ignoring Manufacturer Instructions

Certified equipment is tested under specified operating conditions.

Using it contrary to its instructions may prevent it from achieving the performance for which it was certified.

Concept-Check Questions

Question 1

Which pair does EPA currently identify as approved organizations for certifying Section 608 recovery and recycling equipment?

A. ASHRAE and DOT

B. AHRI and UL

C. OSHA and NIST

D. EPA and DOE

Question 2

Why is November 15, 1993 important when evaluating recovery and recycling equipment under Section 608?

A. It is the date all CFC production ended worldwide.

B. It separates important legacy and third-party equipment-certification requirements.

C. It is the date Universal technician certification began to expire.

D. It is the date all recovery cylinders became disposable.

Question 3

Recovery equipment manufactured on or after January 1, 2017 for use with non-flammable refrigerants is generally certified under which framework?

A. Appendix B3 based on AHRI Standard 740-2016

B. Appendix B1 based on ARI Standard 740-1993

C. Appendix A based on AHRI Standard 700-2016

D. Section 609 only

Question 4

Using recovery equipment manufactured on or after November 15, 1993, what percentage of refrigerant must generally be recovered from a small appliance when the appliance compressor is functional?

A. 50%

B. 80%

C. 90%

D. 100%

Question 5

What is the primary purpose of a low-loss fitting?

A. To increase refrigerant pressure during recovery

B. To minimize refrigerant release when a hose or connection is disconnected

C. To identify refrigerant by color

D. To measure deep vacuum in microns

Question 6

Which statement best describes a process stub?

A. A permanent receiver used to store the full system charge

B. A length of tubing providing refrigerant access to a small appliance or room air conditioner that can be resealed

C. A recovery-cylinder liquid valve

D. A fitting used only on low-pressure chillers

Question 7

Which term is used in the current federal rule for the access provided on covered appliances other than small appliances to facilitate refrigerant removal during servicing and disposal?

A. Charging tap

B. Process stub

C. Servicing aperture

D. Relief manifold

Question 8

How must recovery and recycling equipment be operated under current Section 608 requirements?

A. According to technician preference whenever recovery is faster

B. According to manufacturer directions unless those directions conflict with federal requirements

C. Only according to the instructions printed on the refrigerant cylinder

D. Without reference to manufacturer directions once the technician earns Universal certification

Answers and detailed explanations will be provided in 5.12 - Answers and Explanations.md.

Section Summary

Section 608 recovery-equipment certification verifies that equipment can meet applicable EPA performance requirements.

The main distinctions are:

Technician certification
→ person

Recovery-equipment certification
→ equipment model

EPA currently identifies:

AHRI
UL

as approved equipment testing organizations.

Important equipment dates are:

November 15, 1993
September 22, 2003
January 1, 2017

For current-generation equipment:

2017+ non-flammable
→ Appendix B3
→ AHRI 740-2016

2017+ flammable
→ Appendix B4
→ AHRI 740-2016
+
UL 1963 safety provisions

For small appliances:

Post-1993 recovery equipment
+
functional compressor
→ 90% recovery

Post-1993 recovery equipment
+
nonfunctional compressor
→ 80% recovery

or:

4 in. Hg vacuum
→ allowed alternative

Service-access concepts are:

Low-loss fitting
→ minimizes release during disconnection

Small appliance
→ process stub

Other covered appliance
→ servicing aperture

Finally:

Use recovery equipment according to manufacturer directions
unless those directions conflict with federal requirements.

The next section moves from equipment certification and fittings to the actual preparation required before beginning a recovery operation.

See Section 5.4 - Recovery Preparation.

References

Current Regulatory and EPA Sources

1. U.S. Environmental Protection Agency, Refrigerant Recovery and Recycling Equipment Certification, accessed August 9, 2026.

2. U.S. Environmental Protection Agency, Stationary Refrigeration Service Practice Requirements, accessed August 9, 2026.

3. U.S. Environmental Protection Agency, Section 608 Test Topics, accessed August 9, 2026.

4. Electronic Code of Federal Regulations, 40 CFR § 82.152 — Definitions, accessed August 9, 2026.

5. Electronic Code of Federal Regulations, 40 CFR § 82.154 — Prohibitions, accessed August 9, 2026.

6. Electronic Code of Federal Regulations, 40 CFR § 82.156 — Proper Evacuation of Refrigerant from Appliances, accessed August 9, 2026.

7. Electronic Code of Federal Regulations, 40 CFR § 82.158 — Standards for Recovery and/or Recycling Equipment, accessed August 9, 2026.

8. Electronic Code of Federal Regulations, Appendix B3 to 40 CFR Part 82, Subpart F, accessed August 9, 2026.

9. Electronic Code of Federal Regulations, Appendix B4 to 40 CFR Part 82, Subpart F, accessed August 9, 2026.

10. Electronic Code of Federal Regulations, Appendix C to 40 CFR Part 82, Subpart F — Method for Testing Recovery Devices for Use With Small Appliances, accessed August 9, 2026.

Project Cross-References

13. Section 5.1 - Recover Recycle and Reclaim.

14. Section 5.2 - Recovery Equipment Categories.

15. Section 4.5 - Manifold Gauge Set and Service Hoses.

16. Section 4.6 - Gauge Pressure Absolute Pressure and Vacuum.